What is a half-space?

In geophysics we often refer to “half-space” when talking about survey methods and theory. But what is it?  Consider that…

What is resistivity?

Resistivity is an intrinsic electrical property of a given material, defining how it resists the flow of electrical current. The…

What is apparent resistivity?

When we use a set of electrodes to measure resistivity, what we actually record in the field is an apparent…

Which geophysical methods do I need for geotechnical applications?

Arguably, the most common geophysical methods for geotechnical applications are GPR, resistivity and seismics. In most situations, especially for complex…

I have an EM locator. Do I need a GPR as well?

EM Locators (EML, electromagnetic pipe & cable locators) is a universal technology for locating and tracing buried utility lines. As…

What is the footprint of a GPR?  

The footprint of a GPR describes the radiation pattern form, emitted by a GPR antenna. The size and shape of…

What is an electrode test?

An electrode test, or electrode contact test, is a feature on the ABEM Terrameter LS2 which checks the quality of…

What is Geophysics?

Geophysics is the physics of the Earth, but it has developed into a field with much broader implications. Geophysicists use…

Can I combine resistivity and GPR for bedrock mapping?

Yes, resistivity and GPR make an excellent pairing and together will often provide a more complete visualization of the bedrock depth…

Can I do TEM measurements in urban areas?  

TEM measurements are not possible in urban areas due to the numerous sources of electromagnetic noise that are present.   TEM…